Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

GD • I/SI2 • GIA 6525240450

Certificate GIA 6525240450

Diamond specifications and retailer prices

From $5,455 NZD

$3,069 USD

As of November 2, 2026

Save $6,507 NZD (54%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: $11,961 NZD at NZ Jewellers · As of October 27, 2026

View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6525240450. Listed at 14 retailers as of October 27, 2026, with prices from $5,455 to $11,961, a $6,507 spread on the same certified stone. NZ Jewellers lists it at $11,961. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51

Carat

Colour

SI2

Clarity

Good

Cut (retailer stated)

Specifications

Cut (retailer stated)Good

PolishExcellent

SymmetryExcellent

FluorescenceStrong

OriginNatural

Grading LabGIA

CertificateGIA 6525240450

Dimensions7.34 × 5.63 × 4.06 mm

L/W Ratio1.30

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutGood

PolishExcellent

SymmetryExcellent

FluorescenceStrong

CertificateGIA 6525240450

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2

Current: $11,961 NZD|Low: $4,959 NZD|High: $11,961 NZD|Avg: $7,523 NZD

NZ Jewellers

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

November 2, 2026

Retailer 6$5,394 NZD

Retailer 7$5,455 NZD

Retailer 9$6,219 NZD

Retailer 10$6,219 NZD

Retailer 8$6,459 NZD

Retailer 2$6,696 NZD

Retailer 4$7,023 NZD

Retailer 3$7,564 NZD

Retailer 5$11,482 NZD

NZ Jewellers$11,961 NZD

41 data points across 10 retailers

14 retailers$5,455 NZD to $11,961 NZD

Retailer 1

$5,394 NZD

$3,035 USD

Price last confirmed 8 days ago

B+

Retailer 2

$5,455 NZD

$3,069 USD

View

Final sale: no returns

B+

Retailer 3

$5,522 NZD

$3,107 USD

View

Retailer 4

$6,219 NZD

$3,499 USD

View

Price last confirmed 8 days ago

Retailer 5

$6,219 NZD

$3,499 USD

View

Price last confirmed 11 days ago

Retailer 6

$6,459 NZD

$3,634 USD

View

Price last confirmed 8 days ago

B+

Retailer 7

$6,696 NZD

£2,967 GBP

View

B+

Retailer 8

$6,818 NZD

$3,836 USD

View

B+

Retailer 9

$7,023 NZD

£3,111 GBP

View

Retailer 10

$7,177 NZD

$4,038 USD

View

Price last confirmed 10 days ago

B+

Retailer 11

$7,564 NZD

€4,053 EUR

View

Retailer 12

$7,772 NZD

$4,373 USD

View

Price last confirmed 10 days ago

Retailer 13

$11,482 NZD

£5,087 GBP

View

Most Expensive

NZ Jewellers

363558b4-d8ed-4fd6-9675-3dbf51520a58 · Oct 27

$11,961 NZD

$6,730 USD

View

13 more retailers have this diamond

Prices start from $5,455 NZDSave up to $6,507 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

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B+

1.51ct Radiant

$5,455 NZD